Japanese knotweed: Property buyers and sellers urged to be alert for menace that can knock 10% off prices

Online search tool enables you to check for incidences within 4km of where you live

Friday, 7th May 2021, 4:37 pm
Updated Friday, 7th May 2021, 4:38 pm
Japanese knotweed is a menace to property owners

Homeowners are being warned about a property-wrecking plant that could wipe ten per cent off the value of their property.

Experts say Japanese Knotweed in the UK's most invasive plant and has a fearsome reputation for spreading like wildfire.

Unchecked, it can push through cracks in concrete, driveways, paths, patios and drains — and even in the walls of homes, making them tough to sell.

Mat Day, regional director of knotweed experts Environet, said: “Knowledge is power when it comes to Japanese knotweed and this heatmap is invaluable to homeowners and buyers who want to assess the risk in their local area.

"With the stamp duty holiday extended and lockdown restrictions beginning to ease, the property market is busier than ever – but failing to carry out the appropriate checks for knotweed can turn out to be an expensive mistake.

“With professional help, the plant can be dealt with and the value of a property largely restored.

"I’d urge anyone buying or selling a property, or homeowners wishing to preserve the value of their home, to be vigilant for signs of spring growth and check our interactive online tracker to see if they live in a high-risk area.”

Following its winter hibernation, knotweed begins to grow in March or April, depending on the local ground temperature, reaching up to three metres in height by mid-summer.

Homeowners spending more time in their gardens this spring may notice purple or red asparagus-like shoots now emerging from the ground and quickly growing into lush green shrubs with heart or shovel-shaped leaves and pink-flecked stems.